elements in the default skin. This is based on some custom
styling that Florian Balmer has been doing for quoted text on the forum
lately, but the styling is rather different. It affects all such
elements, not just those in forum posts, since I couldn't see a good
reason to restrict it: it should be equally valuable in wiki and
embedded doc articles as well.

Reworked the documentation for email alerts to put all the information
in a single document: a) Moved the "quick email setup" material from the
forums.wiki document into `alerts.md`; b) linked to that moved material
from its original location; c) greatly expanded the material previously
present in the `alerts.md` document; c) merged the `emaildesign.md`
document into `alerts.md`, so we don't have to link out to two separate
documents which previously partially repeated each other. This pass
also fixed a number of grammar errors and broken links.
check-in: 2ef70be2 user: wyoung tags: trunk